Patchwork [U-Boot,v3,3/4] Drivers: block: Support for SATA in Exynos5

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Submitter Vasanth Ananthan
Date Dec. 12, 2012, 8:58 a.m.
Message ID <1355302733-10100-4-git-send-email-vasanthananthan@gmail.com>
Download mbox | patch
Permalink /patch/205465/
State Not Applicable
Delegated to: Minkyu Kang
Headers show

Comments

Vasanth Ananthan - Dec. 12, 2012, 8:58 a.m.
This patch provides support for SATA in Exynos5250

Signed-off-by: Vasanth Ananthan <vasanth.a@samsung.com>
---
 drivers/block/dwc_ahsata.c |  397 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 387 insertions(+), 10 deletions(-)

Patch

diff --git a/drivers/block/dwc_ahsata.c b/drivers/block/dwc_ahsata.c
index c9b71f7..58537d3 100644
--- a/drivers/block/dwc_ahsata.c
+++ b/drivers/block/dwc_ahsata.c
@@ -35,6 +35,64 @@ 
 #include <asm/arch/clock.h>
 #include "dwc_ahsata.h"
 
+#ifdef SATA_DEBUG
+#define debug(fmt, args...)	printf(fmt, ##args)
+#else
+#define debug(fmt, args...)
+#endif /* MKIMAGE_DEBUG */
+
+#define MAX_DATA_BYTES_PER_SG  (4 * 1024 * 1024)
+#define MAX_BYTES_PER_TRANS (AHCI_MAX_SG * MAX_DATA_BYTES_PER_SG)
+
+#define writel_with_flush(a, b)	do { writel(a, b); readl(b); } while (0)
+
+#define EXYNOS5_SATA_PHY_CONTROL	(0x10040000 + 0x724)
+#define S5P_PMU_SATA_PHY_CONTROL_EN	0x1
+
+#define SATA_TIME_LIMIT			10000
+#define SATA_PHY_I2C_SLAVE_ADDRS	0x70
+
+#define SATA_RESET			0x4
+#define RESET_CMN_RST_N			(1 << 1)
+#define LINK_RESET                     0xFF0000
+
+#define SATA_MODE0			0x10
+
+#define SATA_CTRL0			0x14
+#define CTRL0_P0_PHY_CALIBRATED_SEL	(1 << 9)
+#define CTRL0_P0_PHY_CALIBRATED		(1 << 8)
+
+#define SATA_PHSATA_CTRLM		0xE0
+#define PHCTRLM_REF_RATE		(1 << 1)
+#define PHCTRLM_HIGH_SPEED		(1 << 0)
+
+#define SATA_PHSATA_STATM		0xF0
+#define PHSTATM_PLL_LOCKED		(1 << 0)
+
+#define SATA_I2C_CON			0x00
+#define SATA_I2C_STAT			0x04
+#define SATA_I2C_ADDR			0x08
+#define SATA_I2C_DS			0x0C
+#define SATA_I2C_LC			0x10
+
+/* I2CCON reg */
+#define CON_ACKEN			(1 << 7)
+#define CON_CLK512			(1 << 6)
+#define CON_CLK16			(~CON_CLK512)
+#define CON_INTEN			(1 << 5)
+#define CON_INTPND			(1 << 4)
+#define CON_TXCLK_PS			(0xF)
+
+/* I2CSTAT reg */
+#define STAT_MSTT			(0x3 << 6)
+#define STAT_BSYST			(1 << 5)
+#define STAT_RTEN			(1 << 4)
+#define STAT_LAST			(1 << 0)
+
+#define LC_FLTR_EN			(1 << 2)
+
+#define SATA_PHY_CON_RESET		0xF003F
+
 struct sata_port_regs {
 	u32 clb;
 	u32 clbu;
@@ -88,10 +146,243 @@  struct sata_host_regs {
 	u32 idr;
 };
 
-#define MAX_DATA_BYTES_PER_SG  (4 * 1024 * 1024)
-#define MAX_BYTES_PER_TRANS (AHCI_MAX_SG * MAX_DATA_BYTES_PER_SG)
+void * const phy_ctrl = (void *)EXYNOS5_SATA_PHY_BASE;
+void * const phy_i2c_base = (void *)EXYNOS5_SATA_PHY_I2C;
 
-#define writel_with_flush(a, b)	do { writel(a, b); readl(b); } while (0)
+enum {
+	SATA_GENERATION1,
+	SATA_GENERATION2,
+	SATA_GENERATION3,
+};
+
+static u8 sata_is_reg(void *base, u32 reg, u32 checkbit, u32 status)
+{
+	if ((readl(base + reg) & checkbit) == status)
+		return 1;
+	else
+		return 0;
+}
+
+static u8 wait_for_reg_status(void *base, u32 reg, u32 checkbit,
+		u32 status)
+{
+	u32 time_limit_cnt = 0;
+	while (!sata_is_reg(base, reg, checkbit, status)) {
+		if (time_limit_cnt == SATA_TIME_LIMIT)
+			return 0;
+		udelay(1000);
+		time_limit_cnt++;
+	}
+	return 1;
+}
+
+static void sata_set_gen(u8 gen)
+{
+	writel(gen, phy_ctrl + SATA_MODE0);
+}
+
+/* Address :I2C Address */
+static void sata_i2c_write_addrs(u8 data)
+{
+	writeb((data & 0xFE), phy_i2c_base + SATA_I2C_DS);
+}
+
+static void sata_i2c_write_data(u8 data)
+{
+	writeb((data), phy_i2c_base + SATA_I2C_DS);
+}
+
+static void sata_i2c_start(void)
+{
+	u32 val;
+	val = readl(phy_i2c_base + SATA_I2C_STAT);
+	val |= STAT_BSYST;
+	writel(val, phy_i2c_base + SATA_I2C_STAT);
+}
+
+static void sata_i2c_stop(void)
+{
+	u32 val;
+	val = readl(phy_i2c_base + SATA_I2C_STAT);
+	val &= ~STAT_BSYST;
+	writel(val, phy_i2c_base + SATA_I2C_STAT);
+}
+
+static u8 sata_i2c_get_int_status(void)
+{
+	if ((readl(phy_i2c_base + SATA_I2C_CON)) & CON_INTPND)
+		return 1;
+	else
+		return 0;
+}
+
+static u8 sata_i2c_is_tx_ack(void)
+{
+	if ((readl(phy_i2c_base + SATA_I2C_STAT)) & STAT_LAST)
+		return 0;
+	else
+		return 1;
+}
+
+static u8 sata_i2c_is_bus_ready(void)
+{
+	if ((readl(phy_i2c_base + SATA_I2C_STAT)) & STAT_BSYST)
+		return 0;
+	else
+		return 1;
+}
+
+static u8 sata_i2c_wait_for_busready(u32 time_out)
+{
+	while (--time_out) {
+		if (sata_i2c_is_bus_ready())
+			return 1;
+		udelay(100);
+	}
+	return 0;
+}
+
+static u8 sata_i2c_wait_for_tx_ack(u32 time_out)
+{
+	while (--time_out) {
+		if (sata_i2c_get_int_status()) {
+			if (sata_i2c_is_tx_ack())
+				return 1;
+		}
+		udelay(100);
+	}
+	return 0;
+}
+
+static void sata_i2c_clear_int_status(void)
+{
+	u32 val;
+	val = readl(phy_i2c_base + SATA_I2C_CON);
+	val &= ~CON_INTPND;
+	writel(val, phy_i2c_base + SATA_I2C_CON);
+}
+
+static void sata_i2c_set_ack_gen(u8 enable)
+{
+	u32 val;
+	if (enable) {
+		val = (readl(phy_i2c_base + SATA_I2C_CON)) | CON_ACKEN;
+		writel(val, phy_i2c_base + SATA_I2C_CON);
+	} else {
+		val = readl(phy_i2c_base + SATA_I2C_CON);
+		val &= ~CON_ACKEN;
+		writel(val, phy_i2c_base + SATA_I2C_CON);
+	}
+
+}
+
+static void sata_i2c_set_master_tx(void)
+{
+	u32 val;
+	/* Disable I2C */
+	val = readl(phy_i2c_base + SATA_I2C_STAT);
+	val &= ~STAT_RTEN;
+	writel(val, phy_i2c_base + SATA_I2C_STAT);
+	/* Clear Mode */
+	val = readl(phy_i2c_base + SATA_I2C_STAT);
+	val &= ~STAT_MSTT;
+	writel(val, phy_i2c_base + SATA_I2C_STAT);
+	sata_i2c_clear_int_status();
+	/* interrupt disable */
+	val = readl(phy_i2c_base + SATA_I2C_CON);
+	val &= ~CON_INTEN;
+	writel(val, phy_i2c_base + SATA_I2C_CON);
+
+	/* Master, Send mode */
+	val = readl(phy_i2c_base + SATA_I2C_STAT);
+	val |=	STAT_MSTT;
+	writel(val, phy_i2c_base + SATA_I2C_STAT);
+
+	/* interrupt enable */
+	val = readl(phy_i2c_base + SATA_I2C_CON);
+	val |=	CON_INTEN;
+	writel(val, phy_i2c_base + SATA_I2C_CON);
+
+	/* Enable I2C */
+	val = readl(phy_i2c_base + SATA_I2C_STAT);
+	val |= STAT_RTEN;
+	writel(val, phy_i2c_base + SATA_I2C_STAT);
+}
+
+static void sata_i2c_init(void)
+{
+	u32 val;
+
+	val = readl(phy_i2c_base + SATA_I2C_CON);
+	val &= CON_CLK16;
+	writel(val, phy_i2c_base + SATA_I2C_CON);
+
+	val = readl(phy_i2c_base + SATA_I2C_CON);
+	val &= ~(CON_TXCLK_PS);
+	writel(val, phy_i2c_base + SATA_I2C_CON);
+
+	val = readl(phy_i2c_base + SATA_I2C_CON);
+	val |= (2 & CON_TXCLK_PS);
+	writel(val, phy_i2c_base + SATA_I2C_CON);
+
+	val = readl(phy_i2c_base + SATA_I2C_LC);
+	val &= ~(LC_FLTR_EN);
+	writel(val, phy_i2c_base + SATA_I2C_LC);
+
+	sata_i2c_set_ack_gen(0);
+}
+
+static u8 sata_i2c_send(u8 slave_addrs, u8 addrs, u8 ucData)
+{
+	s32 ret = 0;
+	if (!sata_i2c_wait_for_busready(SATA_TIME_LIMIT))
+		return 0;
+
+	sata_i2c_init();
+	sata_i2c_set_master_tx();
+
+	writel(SATA_PHY_CON_RESET, phy_ctrl + SATA_RESET);
+	sata_i2c_write_addrs(slave_addrs);
+	sata_i2c_start();
+	if (!sata_i2c_wait_for_tx_ack(SATA_TIME_LIMIT)) {
+		ret = 0;
+		goto STOP;
+	}
+	sata_i2c_write_data(addrs);
+	sata_i2c_clear_int_status();
+	if (!sata_i2c_wait_for_tx_ack(SATA_TIME_LIMIT)) {
+		ret = 0;
+		goto STOP;
+	}
+	sata_i2c_write_data(ucData);
+	sata_i2c_clear_int_status();
+	if (!sata_i2c_wait_for_tx_ack(SATA_TIME_LIMIT)) {
+		ret = 0;
+		goto STOP;
+	}
+	ret = 1;
+
+STOP:
+	sata_i2c_stop();
+	sata_i2c_clear_int_status();
+	sata_i2c_wait_for_busready(SATA_TIME_LIMIT);
+
+	return ret;
+}
+
+static u8 sata_phy_i2c_init()
+{
+	/* 0x3A for 40bit I/F */
+	u8 reg_addrs =  0x3A;
+	/* 0x0B for 40bit I/F */
+	u8 default_setting_value = 0x0B;
+
+	if (!sata_i2c_send(SATA_PHY_I2C_SLAVE_ADDRS, reg_addrs,
+					default_setting_value))
+		return 0;
+
+	return 1;
+}
 
 static int is_ready;
 
@@ -127,6 +418,62 @@  static int ahci_setup_oobr(struct ahci_probe_ent *probe_ent,
 	return 0;
 }
 
+static int sata_phy_init(int port_num)
+{
+	int val, ret;
+
+	if (sata_is_reg(phy_ctrl, SATA_CTRL0,
+		CTRL0_P0_PHY_CALIBRATED, CTRL0_P0_PHY_CALIBRATED))
+		return 0;
+
+	writel(S5P_PMU_SATA_PHY_CONTROL_EN, EXYNOS5_SATA_PHY_CONTROL);
+
+	val = 0;
+	writel(val, phy_ctrl + SATA_RESET);
+	val = readl(phy_ctrl + SATA_RESET);
+	val |= 0x3D;
+	writel(val, phy_ctrl + SATA_RESET);
+
+	val = readl(phy_ctrl + SATA_RESET);
+	val |= LINK_RESET;
+	writel(val, phy_ctrl + SATA_RESET);
+
+	val = readl(phy_ctrl + SATA_RESET);
+	val |= RESET_CMN_RST_N;
+	writel(val, phy_ctrl + SATA_RESET);
+
+	val = readl(phy_ctrl + SATA_PHSATA_CTRLM);
+	val &= ~PHCTRLM_REF_RATE;
+	writel(val, phy_ctrl + SATA_PHSATA_CTRLM);
+
+	/* High speed enable for Gen3 */
+	val = readl(phy_ctrl + SATA_PHSATA_CTRLM);
+	val |= PHCTRLM_HIGH_SPEED;
+	writel(val, phy_ctrl + SATA_PHSATA_CTRLM);
+
+	ret = sata_phy_i2c_init();
+
+	val = readl(phy_ctrl + SATA_CTRL0);
+	val |= CTRL0_P0_PHY_CALIBRATED_SEL|CTRL0_P0_PHY_CALIBRATED;
+	writel(val, phy_ctrl + SATA_CTRL0);
+	sata_set_gen(SATA_GENERATION3);
+
+       /* release cmu reset */
+	val = readl(phy_ctrl + SATA_RESET);
+	val &= ~RESET_CMN_RST_N;
+	writel(val, phy_ctrl + SATA_RESET);
+
+	val = readl(phy_ctrl + SATA_RESET);
+	val |= RESET_CMN_RST_N;
+	writel(val, phy_ctrl + SATA_RESET);
+
+	if (wait_for_reg_status(phy_ctrl, SATA_PHSATA_STATM,
+					PHSTATM_PLL_LOCKED, 1))
+		return ret;
+
+	return 0;
+}
+
 static int ahci_host_init(struct ahci_probe_ent *probe_ent)
 {
 	u32 tmp, cap_save, num_ports;
@@ -134,10 +481,11 @@  static int ahci_host_init(struct ahci_probe_ent *probe_ent)
 	struct sata_port_regs *port_mmio = NULL;
 	struct sata_host_regs *host_mmio =
 		(struct sata_host_regs *)probe_ent->mmio_base;
-	int clk = mxc_get_clock(MXC_SATA_CLK);
+	int clk = get_sata_clk();
 
 	cap_save = readl(&(host_mmio->cap));
 	cap_save |= SATA_HOST_CAP_SSS;
+	cap_save &= ~(SATA_HOST_CAP_SMPS);
 
 	/* global controller reset */
 	tmp = readl(&(host_mmio->ghc));
@@ -156,10 +504,8 @@  static int ahci_host_init(struct ahci_probe_ent *probe_ent)
 	/* Set timer 1ms */
 	writel(clk / 1000, &(host_mmio->timer1ms));
 
-	ahci_setup_oobr(probe_ent, 0);
-
 	writel_with_flush(SATA_HOST_GHC_AE, &(host_mmio->ghc));
-	writel(cap_save, &(host_mmio->cap));
+	writel_with_flush(cap_save, &(host_mmio->cap));
 	num_ports = (cap_save & SATA_HOST_CAP_NP_MASK) + 1;
 	writel_with_flush((1 << num_ports) - 1,
 				&(host_mmio->pi));
@@ -219,11 +565,37 @@  static int ahci_host_init(struct ahci_probe_ent *probe_ent)
 				debug("port reset failed (0x%x)\n", tmp);
 				return -1;
 			}
+
+			tmp &= ~SATA_PORT_CMD_FRE;
+			writel_with_flush(tmp, &(port_mmio->cmd));
+
+			timeout = 1000;
+
+			while ((readl(&(port_mmio->cmd)) & SATA_PORT_CMD_FR)
+				&& --timeout)
+				;
+
+			if (timeout <= 0) {
+				debug("port reset failed (0x%x)\n", tmp);
+				return -1;
+			}
 		}
 
+		tmp = readl(&(port_mmio->sctl));
+		tmp &= (SATA_PORT_SSTS_DET_MASK);
+		writel_with_flush(tmp, &(port_mmio->sctl));
+
 		/* Spin-up device */
 		tmp = readl(&(port_mmio->cmd));
-		writel((tmp | SATA_PORT_CMD_SUD), &(port_mmio->cmd));
+
+		tmp |= (SATA_PORT_CMD_SUD |
+			SATA_PORT_CMD_HPCP);
+
+		tmp &= ~(SATA_PORT_CMD_MPSP |
+			 SATA_PORT_CMD_CPD  |
+			 SATA_PORT_CMD_ESP);
+
+		writel(tmp, &(port_mmio->cmd));
 
 		/* Wait for spin-up to finish */
 		timeout = 1000;
@@ -235,6 +607,8 @@  static int ahci_host_init(struct ahci_probe_ent *probe_ent)
 			return -1;
 		}
 
+		sata_phy_init(i);
+
 		for (j = 0; j < 100; ++j) {
 			mdelay(10);
 			tmp = readl(&(port_mmio->ssts));
@@ -273,7 +647,7 @@  static int ahci_host_init(struct ahci_probe_ent *probe_ent)
 
 		/* set irq mask (enables interrupts) */
 		writel(DEF_PORT_IRQ, &(port_mmio->ie));
-
+		mdelay(100);
 		/* register linkup ports */
 		tmp = readl(&(port_mmio->ssts));
 		debug("Port %d status: 0x%x\n", i, tmp);
@@ -571,6 +945,8 @@  int init_sata(int dev)
 		return -1;
 	}
 
+	set_sata_clk();
+
 	ahci_init_one(dev);
 
 	probe_ent = (struct ahci_probe_ent *)sata_dev_desc[dev].priv;
@@ -941,11 +1317,13 @@  int scan_sata(int dev)
 	pdev->blksz = ATA_SECT_SIZE;
 	pdev->lun = 0 ;
 
+#ifdef CONFIG_LBA48
 	/* Check if support LBA48 */
 	if (ata_id_has_lba48(id)) {
 		pdev->lba48 = 1;
 		debug("Device support LBA48\n\r");
 	}
+#endif
 
 	/* Get the NCQ queue depth from device */
 	probe_ent->flags &= (~SATA_FLAG_Q_DEP_MASK);
@@ -965,6 +1343,5 @@  int scan_sata(int dev)
 	dwc_ahsata_print_info(dev);
 
 	is_ready = 1;
-
 	return 0;
 }